Proving the Negative Times Negative Rule

This video tutorial explains why multiplying two negative numbers results in a positive number. It begins with a review of basic multiplication rules for negative numbers, then covers key mathematical properties such as the additive inverse, zero property, and distributive property. The tutorial uses these properties to prove that a negative times a negative equals a positive, ensuring the equation remains balanced throughout the process.

What is the result when two numbers with different signs are multiplied?

• The same number

• A negative number

• A positive number

• Zero

What is the additive inverse of -5?

• 0

• 5

• 10

• -5

According to the zero property, what is the result of any number multiplied by zero?

• One

• A negative number

• Zero

• The number itself

Which property allows you to multiply a number outside the parentheses by each number inside?

• Multiplicative Identity

• Distributive Property

• Zero Property

• Additive Inverse

What is the result of multiplying -5 by -5?

• 25

• -25

• 5

• 0